Superconductor technology: apparatus – material – process – High temperature devices – systems – apparatus – com- ponents,... – High frequency waveguides – resonators – electrical networks,...
Patent
1992-12-01
1995-12-05
Lee, Benny T.
Superconductor technology: apparatus, material, process
High temperature devices, systems, apparatus, com- ponents,...
High frequency waveguides, resonators, electrical networks,...
505700, 505701, 505866, 333 99S, 333161, H01P 118, H01P 900, H03H 1116, H01B 1202
Patent
active
054729351
ABSTRACT:
The disclosure relates to ferroelectric and superconducting thin films used in combination to produce low-loss passive microwave and millimeter wave devices which are frequency tuneable. Various metal oxide superconducting and ferroelectric thin films can be deposited in numerous multilayer geometries via a variety of deposition techniques to produce devices which can manipulate microwave and millimeter wave signals through the application of voltage bias signals across the ferroelectric films. Numerous superconducting microwave and millimeter wave devices, including delay lines, phase shifters, resonators, oscillators, filters, electrically-small antennas, half-loop antennas, directional couplers, patch antennas, and various radiative gratings, are made frequency-tuneable by utilizing voltage-tuneable capacitor structures fabricated from voltage-biased ferroelectric thin films. Tuneable antenna arrays are also disclosed incorporating the combined superconducting and ferroelectric thin film structures and geometries which allow for electrical steering of beam patterns by the application of one or more voltage bias signals to ferroelectric thin film gratings.
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Das, S. N.; "Ferroelectrics for Time Delay Steering of an Array"; Ferroelectrics; vol. 5, 1973; pp. 253-257.
Track, E. K. et al.; "Investigation of an electrically tuned 100 Ghz Superconducting Phase Shifter"; IEEE Trans on Magnetics; vol. 27, No. 2, Mar. 1991; pp. 2700-2704.
Barnes Frank
Hermann Allen M.
Price John C.
Scott James F.
Yandrofski Robert M.
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